Description
world_SIMBA$continent = c("Oceania", "Asia", "America", "America", "Asia", "Europe", "Africa", "Europe", "Europe", "Europe", "Europe", "Europe", "Oceania", "Europe", "Europe", "Europe", "Africa", "Europe", "America")
continent = world_SIMBA %>%
group_by(continent) %>%
summarise(n_studies = sum(n_studies))
paste0(
"Among them, we were able to access the data of ",
length(unique(dat_main$ID)),
" unique studies, and we were able to collect raw data from ",
sum(dat_main[!duplicated(dat_main$ID),]$raw_data=="YES"),
" studies Out of the ",
length(unique(dat_main$ID)),
" studies, ",
continent[continent$continent=="America", ]$n_studies,
" were conducted in America (",
"among which ",
world_SIMBA[world_SIMBA$COUNTRY=="USA",]$n_studies,
" were conducted in the USA), ",
continent[continent$continent=="Europe", ]$n_studies,
" in Europe, ",
continent[continent$continent=="Oceania", ]$n_studies,
" in Africa, ",
continent[continent$continent=="Asia", ]$n_studies,
" in Asia, and ",
continent[continent$continent=="Africa", ]$n_studies,
" in Oceania. The number of participants per study ranged from ",
min(as.numeric(dat_main$N)),
" to ",
max(as.numeric(dat_main$N)),
". The mean length of follow up ranged from ",
min(as.numeric(dat_main$followupduration)),
" years to ",
round(max(as.numeric(dat_main$followupduration))),
" years. Among the ",
sum(dat_main[!duplicated(dat_main$ID),]$Cut_off_date=="Official"),
" studies included in our main analyses, ",
sum(dat_main[!duplicated(dat_main$ID),]$diag.procedure=="Diagnosis", na.rm=TRUE),
" studies categorized ADHD using a formal diagnostic procedure, ",
sum(dat_main[!duplicated(dat_main$ID),]$diag.procedure=="Symptoms", na.rm=TRUE),
" based on symptoms count, and ",
sum(dat_main[!duplicated(dat_main$ID),]$diag.procedure=="Broad-based-scale", na.rm=TRUE),
" based on the results of broad-based scales (such as the CBCL or SDQ)."
)
## [1] "Among them, we were able to access the data of 57 unique studies, and we were able to collect raw data from 34 studies Out of the 57 studies, 25 were conducted in America (among which 22 were conducted in the USA), 22 in Europe, 5 in Africa, 3 in Asia, and 2 in Oceania. The number of participants per study ranged from 10 to 813. The mean length of follow up ranged from 4 years to 33 years. Among the 42 studies included in our main analyses, 28 studies categorized ADHD using a formal diagnostic procedure, 17 based on symptoms count, and 12 based on the results of broad-based scales (such as the CBCL or SDQ)."